The word "tides" is a generic term used to define the alternating rise and fall in sea level with respect to the land, produced by the gravitational attraction of the moon and the sun. The most familiar evidence of the tides along our seashores is the observed recurrence of high and low water - usually, but not always, twice daily.

The Surf Forecast contains surf and rip current information for the beaches of Southern California. A Marine Weather Statement is a multi-purpose product. It is a High Surf Advisory when large and dangerous surf is widespread along the coast. The Marine Weather Statement may also describe other potentially dangerous boating or beach conditions such as non-severe thunderstorms, strong rip currents, or minor tidal overflow.